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Updated: Jun 18, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Phase singularities and spectral changes of spectrally partially coherent higher-order Bessel-Gauss pulsed beams
Chaoliang Ding1, Liuzhan Pan, Baida Lü
1Institute of Laser Physics & Chemistry, Sichuan University, Chengdu 610064, China.
Abstract:
Phase singularities and spectral changes of spectrally partially coherent higher-order Bessel-Gauss pulsed beams in free-space propagation are studied, and the analytical expressions for the spectral degree of coherence and spectrum are derived. It is shown that there always exists an optical vortex at the center of the beam and the topological charge is conserved during the propagation. Some circular edge dislocations appear and the spectrum changes on propagation. A rapid spectral transition takes place. Numerical illustrative examples are given and the results are explained physically.
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